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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one or more<a name="line.2"></a>
<span class="sourceLineNo">003</span> * contributor license agreements. See the NOTICE file distributed with<a name="line.3"></a>
<span class="sourceLineNo">004</span> * this work for additional information regarding copyright ownership.<a name="line.4"></a>
<span class="sourceLineNo">005</span> * The ASF licenses this file to You under the Apache license, Version 2.0<a name="line.5"></a>
<span class="sourceLineNo">006</span> * (the "License"); you may not use this file except in compliance with<a name="line.6"></a>
<span class="sourceLineNo">007</span> * the License. You may obtain a copy of the License at<a name="line.7"></a>
<span class="sourceLineNo">008</span> *<a name="line.8"></a>
<span class="sourceLineNo">009</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.9"></a>
<span class="sourceLineNo">010</span> *<a name="line.10"></a>
<span class="sourceLineNo">011</span> * Unless required by applicable law or agreed to in writing, software<a name="line.11"></a>
<span class="sourceLineNo">012</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.12"></a>
<span class="sourceLineNo">013</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.13"></a>
<span class="sourceLineNo">014</span> * See the license for the specific language governing permissions and<a name="line.14"></a>
<span class="sourceLineNo">015</span> * limitations under the license.<a name="line.15"></a>
<span class="sourceLineNo">016</span> */<a name="line.16"></a>
<span class="sourceLineNo">017</span>package org.apache.logging.log4j.core.filter;<a name="line.17"></a>
<span class="sourceLineNo">018</span><a name="line.18"></a>
<span class="sourceLineNo">019</span>import java.util.ArrayList;<a name="line.19"></a>
<span class="sourceLineNo">020</span>import java.util.Arrays;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import java.util.Iterator;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import java.util.List;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import java.util.concurrent.TimeUnit;<a name="line.23"></a>
<span class="sourceLineNo">024</span><a name="line.24"></a>
<span class="sourceLineNo">025</span>import org.apache.logging.log4j.Level;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import org.apache.logging.log4j.Marker;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import org.apache.logging.log4j.core.AbstractLifeCycle;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import org.apache.logging.log4j.core.Filter;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import org.apache.logging.log4j.core.LifeCycle2;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import org.apache.logging.log4j.core.LogEvent;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import org.apache.logging.log4j.core.Logger;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.logging.log4j.core.config.Node;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.logging.log4j.core.config.plugins.Plugin;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.logging.log4j.core.config.plugins.PluginElement;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.logging.log4j.core.config.plugins.PluginFactory;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.logging.log4j.core.util.ObjectArrayIterator;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.logging.log4j.message.Message;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.logging.log4j.util.PerformanceSensitive;<a name="line.38"></a>
<span class="sourceLineNo">039</span><a name="line.39"></a>
<span class="sourceLineNo">040</span>/**<a name="line.40"></a>
<span class="sourceLineNo">041</span> * Composes and invokes one or more filters.<a name="line.41"></a>
<span class="sourceLineNo">042</span> */<a name="line.42"></a>
<span class="sourceLineNo">043</span>@Plugin(name = "filters", category = Node.CATEGORY, printObject = true)<a name="line.43"></a>
<span class="sourceLineNo">044</span>@PerformanceSensitive("allocation")<a name="line.44"></a>
<span class="sourceLineNo">045</span>public final class CompositeFilter extends AbstractLifeCycle implements Iterable&lt;Filter&gt;, Filter {<a name="line.45"></a>
<span class="sourceLineNo">046</span><a name="line.46"></a>
<span class="sourceLineNo">047</span> private static final Filter[] EMPTY_FILTERS = new Filter[0];<a name="line.47"></a>
<span class="sourceLineNo">048</span> private final Filter[] filters;<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span> private CompositeFilter() {<a name="line.50"></a>
<span class="sourceLineNo">051</span> this.filters = EMPTY_FILTERS;<a name="line.51"></a>
<span class="sourceLineNo">052</span> }<a name="line.52"></a>
<span class="sourceLineNo">053</span><a name="line.53"></a>
<span class="sourceLineNo">054</span> private CompositeFilter(final Filter[] filters) {<a name="line.54"></a>
<span class="sourceLineNo">055</span> this.filters = filters == null ? EMPTY_FILTERS : filters;<a name="line.55"></a>
<span class="sourceLineNo">056</span> }<a name="line.56"></a>
<span class="sourceLineNo">057</span><a name="line.57"></a>
<span class="sourceLineNo">058</span> public CompositeFilter addFilter(final Filter filter) {<a name="line.58"></a>
<span class="sourceLineNo">059</span> if (filter == null) {<a name="line.59"></a>
<span class="sourceLineNo">060</span> // null does nothing<a name="line.60"></a>
<span class="sourceLineNo">061</span> return this;<a name="line.61"></a>
<span class="sourceLineNo">062</span> }<a name="line.62"></a>
<span class="sourceLineNo">063</span> if (filter instanceof CompositeFilter) {<a name="line.63"></a>
<span class="sourceLineNo">064</span> final int size = this.filters.length + ((CompositeFilter) filter).size();<a name="line.64"></a>
<span class="sourceLineNo">065</span> final Filter[] copy = Arrays.copyOf(this.filters, size);<a name="line.65"></a>
<span class="sourceLineNo">066</span> final int index = this.filters.length;<a name="line.66"></a>
<span class="sourceLineNo">067</span> for (final Filter currentFilter : ((CompositeFilter) filter).filters) {<a name="line.67"></a>
<span class="sourceLineNo">068</span> copy[index] = currentFilter;<a name="line.68"></a>
<span class="sourceLineNo">069</span> }<a name="line.69"></a>
<span class="sourceLineNo">070</span> return new CompositeFilter(copy);<a name="line.70"></a>
<span class="sourceLineNo">071</span> }<a name="line.71"></a>
<span class="sourceLineNo">072</span> final Filter[] copy = Arrays.copyOf(this.filters, this.filters.length + 1);<a name="line.72"></a>
<span class="sourceLineNo">073</span> copy[this.filters.length] = filter;<a name="line.73"></a>
<span class="sourceLineNo">074</span> return new CompositeFilter(copy);<a name="line.74"></a>
<span class="sourceLineNo">075</span> }<a name="line.75"></a>
<span class="sourceLineNo">076</span><a name="line.76"></a>
<span class="sourceLineNo">077</span> public CompositeFilter removeFilter(final Filter filter) {<a name="line.77"></a>
<span class="sourceLineNo">078</span> if (filter == null) {<a name="line.78"></a>
<span class="sourceLineNo">079</span> // null does nothing<a name="line.79"></a>
<span class="sourceLineNo">080</span> return this;<a name="line.80"></a>
<span class="sourceLineNo">081</span> }<a name="line.81"></a>
<span class="sourceLineNo">082</span> // This is not a great implementation but simpler than copying Apache Commons<a name="line.82"></a>
<span class="sourceLineNo">083</span> // Lang ArrayUtils.removeElement() and associated bits (MutableInt),<a name="line.83"></a>
<span class="sourceLineNo">084</span> // which is OK since removing a filter should not be on the critical path.<a name="line.84"></a>
<span class="sourceLineNo">085</span> final List&lt;Filter&gt; filterList = new ArrayList&lt;&gt;(Arrays.asList(this.filters));<a name="line.85"></a>
<span class="sourceLineNo">086</span> if (filter instanceof CompositeFilter) {<a name="line.86"></a>
<span class="sourceLineNo">087</span> for (final Filter currentFilter : ((CompositeFilter) filter).filters) {<a name="line.87"></a>
<span class="sourceLineNo">088</span> filterList.remove(currentFilter);<a name="line.88"></a>
<span class="sourceLineNo">089</span> }<a name="line.89"></a>
<span class="sourceLineNo">090</span> } else {<a name="line.90"></a>
<span class="sourceLineNo">091</span> filterList.remove(filter);<a name="line.91"></a>
<span class="sourceLineNo">092</span> }<a name="line.92"></a>
<span class="sourceLineNo">093</span> return new CompositeFilter(filterList.toArray(new Filter[this.filters.length - 1]));<a name="line.93"></a>
<span class="sourceLineNo">094</span> }<a name="line.94"></a>
<span class="sourceLineNo">095</span><a name="line.95"></a>
<span class="sourceLineNo">096</span> @Override<a name="line.96"></a>
<span class="sourceLineNo">097</span> public Iterator&lt;Filter&gt; iterator() {<a name="line.97"></a>
<span class="sourceLineNo">098</span> return new ObjectArrayIterator&lt;&gt;(filters);<a name="line.98"></a>
<span class="sourceLineNo">099</span> }<a name="line.99"></a>
<span class="sourceLineNo">100</span><a name="line.100"></a>
<span class="sourceLineNo">101</span> /**<a name="line.101"></a>
<span class="sourceLineNo">102</span> * Gets a new list over the internal filter array.<a name="line.102"></a>
<span class="sourceLineNo">103</span> *<a name="line.103"></a>
<span class="sourceLineNo">104</span> * @return a new list over the internal filter array<a name="line.104"></a>
<span class="sourceLineNo">105</span> * @deprecated Use {@link #getFiltersArray()}<a name="line.105"></a>
<span class="sourceLineNo">106</span> */<a name="line.106"></a>
<span class="sourceLineNo">107</span> @Deprecated<a name="line.107"></a>
<span class="sourceLineNo">108</span> public List&lt;Filter&gt; getFilters() {<a name="line.108"></a>
<span class="sourceLineNo">109</span> return Arrays.asList(filters);<a name="line.109"></a>
<span class="sourceLineNo">110</span> }<a name="line.110"></a>
<span class="sourceLineNo">111</span><a name="line.111"></a>
<span class="sourceLineNo">112</span> public Filter[] getFiltersArray() {<a name="line.112"></a>
<span class="sourceLineNo">113</span> return filters;<a name="line.113"></a>
<span class="sourceLineNo">114</span> }<a name="line.114"></a>
<span class="sourceLineNo">115</span><a name="line.115"></a>
<span class="sourceLineNo">116</span> /**<a name="line.116"></a>
<span class="sourceLineNo">117</span> * Returns whether this composite contains any filters.<a name="line.117"></a>
<span class="sourceLineNo">118</span> *<a name="line.118"></a>
<span class="sourceLineNo">119</span> * @return whether this composite contains any filters.<a name="line.119"></a>
<span class="sourceLineNo">120</span> */<a name="line.120"></a>
<span class="sourceLineNo">121</span> public boolean isEmpty() {<a name="line.121"></a>
<span class="sourceLineNo">122</span> return this.filters.length == 0;<a name="line.122"></a>
<span class="sourceLineNo">123</span> }<a name="line.123"></a>
<span class="sourceLineNo">124</span><a name="line.124"></a>
<span class="sourceLineNo">125</span> public int size() {<a name="line.125"></a>
<span class="sourceLineNo">126</span> return filters.length;<a name="line.126"></a>
<span class="sourceLineNo">127</span> }<a name="line.127"></a>
<span class="sourceLineNo">128</span><a name="line.128"></a>
<span class="sourceLineNo">129</span> @Override<a name="line.129"></a>
<span class="sourceLineNo">130</span> public void start() {<a name="line.130"></a>
<span class="sourceLineNo">131</span> this.setStarting();<a name="line.131"></a>
<span class="sourceLineNo">132</span> for (final Filter filter : filters) {<a name="line.132"></a>
<span class="sourceLineNo">133</span> filter.start();<a name="line.133"></a>
<span class="sourceLineNo">134</span> }<a name="line.134"></a>
<span class="sourceLineNo">135</span> this.setStarted();<a name="line.135"></a>
<span class="sourceLineNo">136</span> }<a name="line.136"></a>
<span class="sourceLineNo">137</span><a name="line.137"></a>
<span class="sourceLineNo">138</span> @Override<a name="line.138"></a>
<span class="sourceLineNo">139</span> public boolean stop(final long timeout, final TimeUnit timeUnit) {<a name="line.139"></a>
<span class="sourceLineNo">140</span> this.setStopping();<a name="line.140"></a>
<span class="sourceLineNo">141</span> for (final Filter filter : filters) {<a name="line.141"></a>
<span class="sourceLineNo">142</span> if (filter instanceof LifeCycle2) {<a name="line.142"></a>
<span class="sourceLineNo">143</span> ((LifeCycle2) filter).stop(timeout, timeUnit);<a name="line.143"></a>
<span class="sourceLineNo">144</span> } else {<a name="line.144"></a>
<span class="sourceLineNo">145</span> filter.stop();<a name="line.145"></a>
<span class="sourceLineNo">146</span> }<a name="line.146"></a>
<span class="sourceLineNo">147</span> }<a name="line.147"></a>
<span class="sourceLineNo">148</span> setStopped();<a name="line.148"></a>
<span class="sourceLineNo">149</span> return true;<a name="line.149"></a>
<span class="sourceLineNo">150</span> }<a name="line.150"></a>
<span class="sourceLineNo">151</span><a name="line.151"></a>
<span class="sourceLineNo">152</span> /**<a name="line.152"></a>
<span class="sourceLineNo">153</span> * Returns the result that should be returned when the filter does not match the event.<a name="line.153"></a>
<span class="sourceLineNo">154</span> *<a name="line.154"></a>
<span class="sourceLineNo">155</span> * @return the Result that should be returned when the filter does not match the event.<a name="line.155"></a>
<span class="sourceLineNo">156</span> */<a name="line.156"></a>
<span class="sourceLineNo">157</span> @Override<a name="line.157"></a>
<span class="sourceLineNo">158</span> public Result getOnMismatch() {<a name="line.158"></a>
<span class="sourceLineNo">159</span> return Result.NEUTRAL;<a name="line.159"></a>
<span class="sourceLineNo">160</span> }<a name="line.160"></a>
<span class="sourceLineNo">161</span><a name="line.161"></a>
<span class="sourceLineNo">162</span> /**<a name="line.162"></a>
<span class="sourceLineNo">163</span> * Returns the result that should be returned when the filter matches the event.<a name="line.163"></a>
<span class="sourceLineNo">164</span> *<a name="line.164"></a>
<span class="sourceLineNo">165</span> * @return the Result that should be returned when the filter matches the event.<a name="line.165"></a>
<span class="sourceLineNo">166</span> */<a name="line.166"></a>
<span class="sourceLineNo">167</span> @Override<a name="line.167"></a>
<span class="sourceLineNo">168</span> public Result getOnMatch() {<a name="line.168"></a>
<span class="sourceLineNo">169</span> return Result.NEUTRAL;<a name="line.169"></a>
<span class="sourceLineNo">170</span> }<a name="line.170"></a>
<span class="sourceLineNo">171</span><a name="line.171"></a>
<span class="sourceLineNo">172</span> /**<a name="line.172"></a>
<span class="sourceLineNo">173</span> * Filter an event.<a name="line.173"></a>
<span class="sourceLineNo">174</span> *<a name="line.174"></a>
<span class="sourceLineNo">175</span> * @param logger<a name="line.175"></a>
<span class="sourceLineNo">176</span> * The Logger.<a name="line.176"></a>
<span class="sourceLineNo">177</span> * @param level<a name="line.177"></a>
<span class="sourceLineNo">178</span> * The event logging Level.<a name="line.178"></a>
<span class="sourceLineNo">179</span> * @param marker<a name="line.179"></a>
<span class="sourceLineNo">180</span> * The Marker for the event or null.<a name="line.180"></a>
<span class="sourceLineNo">181</span> * @param msg<a name="line.181"></a>
<span class="sourceLineNo">182</span> * String text to filter on.<a name="line.182"></a>
<span class="sourceLineNo">183</span> * @param params<a name="line.183"></a>
<span class="sourceLineNo">184</span> * An array of parameters or null.<a name="line.184"></a>
<span class="sourceLineNo">185</span> * @return the Result.<a name="line.185"></a>
<span class="sourceLineNo">186</span> */<a name="line.186"></a>
<span class="sourceLineNo">187</span> @Override<a name="line.187"></a>
<span class="sourceLineNo">188</span> public Result filter(final Logger logger, final Level level, final Marker marker, final String msg,<a name="line.188"></a>
<span class="sourceLineNo">189</span> final Object... params) {<a name="line.189"></a>
<span class="sourceLineNo">190</span> Result result = Result.NEUTRAL;<a name="line.190"></a>
<span class="sourceLineNo">191</span> for (int i = 0; i &lt; filters.length; i++) {<a name="line.191"></a>
<span class="sourceLineNo">192</span> result = filters[i].filter(logger, level, marker, msg, params);<a name="line.192"></a>
<span class="sourceLineNo">193</span> if (result == Result.ACCEPT || result == Result.DENY) {<a name="line.193"></a>
<span class="sourceLineNo">194</span> return result;<a name="line.194"></a>
<span class="sourceLineNo">195</span> }<a name="line.195"></a>
<span class="sourceLineNo">196</span> }<a name="line.196"></a>
<span class="sourceLineNo">197</span> return result;<a name="line.197"></a>
<span class="sourceLineNo">198</span> }<a name="line.198"></a>
<span class="sourceLineNo">199</span><a name="line.199"></a>
<span class="sourceLineNo">200</span> /**<a name="line.200"></a>
<span class="sourceLineNo">201</span> * Filter an event.<a name="line.201"></a>
<span class="sourceLineNo">202</span> *<a name="line.202"></a>
<span class="sourceLineNo">203</span> * @param logger<a name="line.203"></a>
<span class="sourceLineNo">204</span> * The Logger.<a name="line.204"></a>
<span class="sourceLineNo">205</span> * @param level<a name="line.205"></a>
<span class="sourceLineNo">206</span> * The event logging Level.<a name="line.206"></a>
<span class="sourceLineNo">207</span> * @param marker<a name="line.207"></a>
<span class="sourceLineNo">208</span> * The Marker for the event or null.<a name="line.208"></a>
<span class="sourceLineNo">209</span> * @param msg<a name="line.209"></a>
<span class="sourceLineNo">210</span> * String text to filter on.<a name="line.210"></a>
<span class="sourceLineNo">211</span> * @param p0 the message parameters<a name="line.211"></a>
<span class="sourceLineNo">212</span> * @return the Result.<a name="line.212"></a>
<span class="sourceLineNo">213</span> */<a name="line.213"></a>
<span class="sourceLineNo">214</span> @Override<a name="line.214"></a>
<span class="sourceLineNo">215</span> public Result filter(final Logger logger, final Level level, final Marker marker, final String msg,<a name="line.215"></a>
<span class="sourceLineNo">216</span> final Object p0) {<a name="line.216"></a>
<span class="sourceLineNo">217</span> Result result = Result.NEUTRAL;<a name="line.217"></a>
<span class="sourceLineNo">218</span> for (int i = 0; i &lt; filters.length; i++) {<a name="line.218"></a>
<span class="sourceLineNo">219</span> result = filters[i].filter(logger, level, marker, msg, p0);<a name="line.219"></a>
<span class="sourceLineNo">220</span> if (result == Result.ACCEPT || result == Result.DENY) {<a name="line.220"></a>
<span class="sourceLineNo">221</span> return result;<a name="line.221"></a>
<span class="sourceLineNo">222</span> }<a name="line.222"></a>
<span class="sourceLineNo">223</span> }<a name="line.223"></a>
<span class="sourceLineNo">224</span> return result;<a name="line.224"></a>
<span class="sourceLineNo">225</span> }<a name="line.225"></a>
<span class="sourceLineNo">226</span><a name="line.226"></a>
<span class="sourceLineNo">227</span> /**<a name="line.227"></a>
<span class="sourceLineNo">228</span> * Filter an event.<a name="line.228"></a>
<span class="sourceLineNo">229</span> *<a name="line.229"></a>
<span class="sourceLineNo">230</span> * @param logger<a name="line.230"></a>
<span class="sourceLineNo">231</span> * The Logger.<a name="line.231"></a>
<span class="sourceLineNo">232</span> * @param level<a name="line.232"></a>
<span class="sourceLineNo">233</span> * The event logging Level.<a name="line.233"></a>
<span class="sourceLineNo">234</span> * @param marker<a name="line.234"></a>
<span class="sourceLineNo">235</span> * The Marker for the event or null.<a name="line.235"></a>
<span class="sourceLineNo">236</span> * @param msg<a name="line.236"></a>
<span class="sourceLineNo">237</span> * String text to filter on.<a name="line.237"></a>
<span class="sourceLineNo">238</span> * @param p0 the message parameters<a name="line.238"></a>
<span class="sourceLineNo">239</span> * @param p1 the message parameters<a name="line.239"></a>
<span class="sourceLineNo">240</span> * @return the Result.<a name="line.240"></a>
<span class="sourceLineNo">241</span> */<a name="line.241"></a>
<span class="sourceLineNo">242</span> @Override<a name="line.242"></a>
<span class="sourceLineNo">243</span> public Result filter(final Logger logger, final Level level, final Marker marker, final String msg,<a name="line.243"></a>
<span class="sourceLineNo">244</span> final Object p0, final Object p1) {<a name="line.244"></a>
<span class="sourceLineNo">245</span> Result result = Result.NEUTRAL;<a name="line.245"></a>
<span class="sourceLineNo">246</span> for (int i = 0; i &lt; filters.length; i++) {<a name="line.246"></a>
<span class="sourceLineNo">247</span> result = filters[i].filter(logger, level, marker, msg, p0, p1);<a name="line.247"></a>
<span class="sourceLineNo">248</span> if (result == Result.ACCEPT || result == Result.DENY) {<a name="line.248"></a>
<span class="sourceLineNo">249</span> return result;<a name="line.249"></a>
<span class="sourceLineNo">250</span> }<a name="line.250"></a>
<span class="sourceLineNo">251</span> }<a name="line.251"></a>
<span class="sourceLineNo">252</span> return result;<a name="line.252"></a>
<span class="sourceLineNo">253</span> }<a name="line.253"></a>
<span class="sourceLineNo">254</span><a name="line.254"></a>
<span class="sourceLineNo">255</span> /**<a name="line.255"></a>
<span class="sourceLineNo">256</span> * Filter an event.<a name="line.256"></a>
<span class="sourceLineNo">257</span> *<a name="line.257"></a>
<span class="sourceLineNo">258</span> * @param logger<a name="line.258"></a>
<span class="sourceLineNo">259</span> * The Logger.<a name="line.259"></a>
<span class="sourceLineNo">260</span> * @param level<a name="line.260"></a>
<span class="sourceLineNo">261</span> * The event logging Level.<a name="line.261"></a>
<span class="sourceLineNo">262</span> * @param marker<a name="line.262"></a>
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</pre>
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